CEH Enumeration and System Hacking Practice Question
A security analyst runs the following command: 'smbclient -L //192.168.1.50 -N'. What is the purpose of this command?
⚠ Common exam trap
Many exam-takers confuse the `-L` (list shares) option with connecting to a share (`//server/share`), leading candidates to mistakenly think the command is attempting an anonymous login to a specific share.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
List available SMB shares on the remote host anonymously
The `smbclient -L` command lists the available SMB shares on a remote host. The `-N` flag suppresses the password prompt, effectively performing an anonymous (null session) enumeration of shares. This is a standard technique in the enumeration phase to discover accessible resources without authentication.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Connect to the remote host's SMB share with a null password
Why it's wrong here
The `smbclient -L` command is specifically designed for listing available shares on a remote host, not for establishing a direct connection to a particular share. To connect to a share, the command syntax would typically include the share name, such as `smbclient //hostname/sharename`. While a null password might be attempted during a connection, the `-L` flag's function is purely for enumeration of resources, not for interactive session establishment.
- ✗
Perform a dictionary attack on SMB passwords
Why it's wrong here
`smbclient` is a standard client utility for interacting with Server Message Block (SMB) network shares, primarily for legitimate file and printer sharing operations. It does not possess built-in capabilities to perform automated dictionary attacks or brute-force password guessing against SMB services. For such offensive tasks, specialized tools like Hydra or Nmap with specific SMB brute-force scripts are typically employed, as `smbclient` is not an attack tool.
- ✗
Enumerate users via SMB
Why it's wrong here
The `smbclient -L` command's primary function is to enumerate shared resources, such as directories and printers, available on an SMB server. It does not directly provide a list of user accounts present on the system. User enumeration via SMB typically requires more advanced techniques or dedicated tools like `enum4linux` or specific Nmap scripting engine (NSE) scripts designed to query for user information through different SMB calls.
- ✓
List available SMB shares on the remote host anonymously
Why this is correct
The `smbclient -L <hostname>` command is precisely used to query a remote SMB server and list all available shares, printers, and other network resources it is exporting. When executed without specifying a username or password, it defaults to attempting an anonymous or guest login, effectively listing shares without requiring authentication. This is a common reconnaissance technique to discover potential targets and map out the network's shared infrastructure.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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